internal external upset drill pipe

例句：

1. 1.The company is located in the heart of the city.
   这家公司位于市中心。
2. 2. The book is about the history of China's internal affairs.
   这本书是关于中国内政的历史。
3. 3. The internal combustion engine works by burning fuel to generate heat and power.
   内燃机通过燃烧燃料产生热量和动力来工作。
4. 1. The car was parked on the street outside the building.
   汽车停在大楼外面的街道上。
5. 2. The external auditorium has a capacity of 500 seats.
   外部礼堂有500个座位的容量。
6. 3. The external temperature is -10°C.
   外部温度是-10°C。
7. 1. She was upset when she found out that her exam results were not good.
   当她发现她的考试成绩不好时，她感到心烦意乱。
8. 2. The storm upset the schedule of the sports meet.
   暴风雨打乱了运动会的时间表。
9. 3. Upset stomachs are common after eating spicy food.
   吃辛辣的食物后，胃会感到不适。
10. 1.They are drilling a new well in the desert.
    他们在沙漠中钻探一口新井。
11. 2. The drill bit broke as soon as it hit the rock.
    钻头一碰到岩石就断了。
12. 3. The drill operator needs to be careful while operating the machine.
    钻机操作员在操作机器时需要小心。